So I think I found it: Castiel/Dean Winchester Gabriel/Sam Winchester Michael/Dean Winchester
Additional Tags: AUSoulmates / Michael is a dick / Violence / Reincarnation / Demon!Dean / demon!Sam / Prisoner of War / Torture / Hurt/Comfort Completed:2014-01-15 Words:49614
Chiral by BoundLight Summary: "After watching humans find love in the oddest places, angels have decided to look to hell to find their soulmates. When Michael finds Dean, he decides to claim him as his own. Dean has other ideas, especially when he meets an angel named Castiel. Michael is not amused, and will do everything in his power to keep them from each other."
no subject
Castiel/Dean Winchester Gabriel/Sam Winchester Michael/Dean Winchester
Additional Tags:
AUSoulmates / Michael is a dick / Violence / Reincarnation / Demon!Dean / demon!Sam / Prisoner of War / Torture / Hurt/Comfort
Completed:2014-01-15 Words:49614
Chiral by BoundLight
Summary: "After watching humans find love in the oddest places, angels have decided to look to hell to find their soulmates. When Michael finds Dean, he decides to claim him as his own. Dean has other ideas, especially when he meets an angel named Castiel. Michael is not amused, and will do everything in his power to keep them from each other."
archiveofourown.org/works/1121897/chapters/2261053